Frailty in elderly patients with acute heart failure increases readmission.

Background: The readmission rate of heart failure (HF) patients has not decreased during the past few years.

Objectives: The purpose of this study was to examine whether factors such as left ventricular ejection fraction (LVEF) and frailty are associated with readmission and number of readmissions in HF patients.

Methods: First, a propensity score matching method was used to adjust for confounding factors for readmission.